<template>
  <transition name="fade" @after-leave="handleAfterLeave">
    <div
      v-show="visible"
      class="loading-mask">
      <div class="loading-spinner">
        <svg class="circular" viewBox="25 25 50 50">
          <circle class="path" cx="50" cy="50" r="20" fill="none"/>
        </svg>
      </div>
    </div>
  </transition>
</template>

<script>
import { ref } from 'vue'
export default {
  name:'Loading',
  setup(props, { emit }) {
    let visible = ref(false)

    return { 
      visible,
      show: () => visible.value = true,
      close: () => visible.value = false,
      handleAfterLeave: () => {
        props.handleLeave()
      }
    }
  },
}
</script>

<style lang="scss">
.loading-mask {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 2000;
  background-color: rgba(246, 246, 246, 0.9);
  margin: 0;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  transition: opacity .3s;
}
.loading-spinner {
  top: 50%;
  margin-top: -21px;
  width: 100%;
  text-align: center;
  position: absolute;
  .circular {
    height: 42px;
    width: 42px;
    animation: loading-rotate 2s linear infinite;
  }
  .path {
    animation: loading-dash 1.5s ease-in-out infinite;
    stroke-dasharray: 90,150;
    stroke-dashoffset: 0;
    stroke-width: 2;
    stroke: #409eff;
    stroke-linecap: round;
  }
}
@keyframes loading-rotate{to{transform:rotate(1turn)}}
@keyframes loading-dash {
  0% {
    stroke-dasharray: 1,200;
    stroke-dashoffset: 0;
  }

  50% {
      stroke-dasharray: 90,150;
      stroke-dashoffset: -40px;
  }
  100% {
      stroke-dasharray: 90,150;
      stroke-dashoffset: -120px;
  }
}
</style>
